CN101036239B - Chip component type light emitting device and wiring board for the same - Google Patents

Chip component type light emitting device and wiring board for the same Download PDF

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Publication number
CN101036239B
CN101036239B CN200580034260XA CN200580034260A CN101036239B CN 101036239 B CN101036239 B CN 101036239B CN 200580034260X A CN200580034260X A CN 200580034260XA CN 200580034260 A CN200580034260 A CN 200580034260A CN 101036239 B CN101036239 B CN 101036239B
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China
Prior art keywords
mentioned
substrate
hole
light
reflection
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Expired - Fee Related
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CN200580034260XA
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Chinese (zh)
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CN101036239A (en
Inventor
西田贵纪
磯田聪
杉浦良治
樱井正幸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Huacheng Electronics Co ltd
Linkus Technology Co ltd
Showa Electric Materials And Electronics Co ltd
Resonac Holdings Corp
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Hitachi AIC Inc
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
    • H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
    • H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
    • H05K1/183—Components mounted in and supported by recessed areas of the printed circuit board
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
    • H01L2224/31—Structure, shape, material or disposition of the layer connectors after the connecting process
    • H01L2224/32—Structure, shape, material or disposition of the layer connectors after the connecting process of an individual layer connector
    • H01L2224/321—Disposition
    • H01L2224/32151—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/32221—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/32225—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805—Shape
    • H01L2224/4809—Loop shape
    • H01L2224/48091—Arched
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    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/481—Disposition
    • H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/48225—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
    • H01L2224/48227—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation connecting the wire to a bond pad of the item
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
    • H01L2224/732—Location after the connecting process
    • H01L2224/73251—Location after the connecting process on different surfaces
    • H01L2224/73265—Layer and wire connectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01—Chemical elements
    • H01L2924/01004—Beryllium [Be]
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    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
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    • H01L2924/01078—Platinum [Pt]
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    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/01—Chemical elements
    • H01L2924/01079—Gold [Au]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/10—Details of semiconductor or other solid state devices to be connected
    • H01L2924/11—Device type
    • H01L2924/12—Passive devices, e.g. 2 terminal devices
    • H01L2924/1204—Optical Diode
    • H01L2924/12041—LED
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
    • H01L2924/151—Die mounting substrate
    • H01L2924/1515—Shape
    • H01L2924/15153—Shape the die mounting substrate comprising a recess for hosting the device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements
    • H01L33/60—Reflective elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/64—Heat extraction or cooling elements
    • H01L33/642—Heat extraction or cooling elements characterized by the shape
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09818—Shape or layout details not covered by a single group of H05K2201/09009 - H05K2201/09809
    • H05K2201/09981—Metallised walls
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10106—Light emitting diode [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/20—Details of printed circuits not provided for in H05K2201/01 - H05K2201/10
    • H05K2201/2054—Light-reflecting surface, e.g. conductors, substrates, coatings, dielectrics
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/46—Manufacturing multilayer circuits
    • H05K3/4611—Manufacturing multilayer circuits by laminating two or more circuit boards
    • H05K3/4623—Manufacturing multilayer circuits by laminating two or more circuit boards the circuit boards having internal via connections between two or more circuit layers before lamination, e.g. double-sided circuit boards
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/46—Manufacturing multilayer circuits
    • H05K3/4697—Manufacturing multilayer circuits having cavities, e.g. for mounting components

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Led Device Packages (AREA)
  • Led Devices (AREA)

Abstract

A chip component type light emitting device, which is provided with a plurality of light emitting elements for providing high optical output at a higher conversion efficiency, and a wiring board for such light emitting device are provided. The chip component type light emitting device having the plurality of light emitting diodes (30, 30...) inside an insulating board is provided with a base board (10) and a reflector board (20) laminate bonded on the upper plane of the base board. On the base board, a through hole (11) is formed, a heat sink (12) made of a thick metal film is formed on the rear plane of the through hole, a reflecting film (13) is formed on the inner circumference and the bottom part of the heat sink, and wiring patterns (14, 14...) are formed. On the reflector board (20), a through hole (21) having a diameter larger than that of the through hole of a base board is formed, and on the inner circumference plane of the through hole, a reflecting film (22) is formed. The reflector board is arranged and bonded on the upper plane of the base board at a position where a part of the wiring pattern exposes through the through hole, and the arranged light emitting diodes are mounted by being connected with the wiring pattern on the base board.

Description

The circuit board of chip component type light emitting device and use thereof
Technical field
The present invention relates to the chip component type light emitting device that the inner light source that carries backlight a plurality of light-emitting components, that can be used as various display floaters, liquid crystal indicator, lighting device etc. of substrate uses and the circuit board of use thereof.
Background technology
In the past, be the chip component type light emitting device of representative with the chip-type LED, use as the light source of the backlight of display floater, liquid crystal indicator, lighting device etc.And the said chip component type light emitting device is accompanied by the expansion of dull and stereotyped purposes in recent years, and it is wide that its scope of application also becomes.Be accompanied by the expansion of such use, the chip part luminescent device need increase the luminous quantity of element self, and need to increase luminous quantity with respect to power consumption, in other words, need to improve the conversion efficiency that converts light to, and, need to be fit to volume production, therefore, the structure of the chip component type light emitting device that need be able to make at a low price.
Chip component type light emitting device in the past, shown in following patent documentation 1～3, generally be to use following circuit board to make: on the part of insulated substrate, to form through hole or the hole of the conical surface is arranged, and form the wiring pattern that is electrically connected in its surface.Promptly, on the heating panel that constitutes by sheet metal that is installed on the above-mentioned circuit board through hole bottom surface, carry as 1 light-emitting component of light-emitting diode etc., then by going between bonding, the electrode of element is connected on the above-mentioned wiring pattern, finishes the chip component type light-emitting component.
Patent documentation 1: No. 3137823 communique of patent
Patent documentation 2: the spy opens the 2000-223752 communique
Patent documentation 3: the spy opens the 2003-31850 communique
Summary of the invention
But the mounting structure of the chip component type light emitting device in the above-mentioned conventional art, for each substrate, be only to carry 1 structure as light-emitting components such as light-emitting diodes, therefore, as above-mentioned, its structure be not suitable for the luminous quantity of each element increase corresponding, the structure of a plurality of light-emitting components is carried in portion within it.
Promptly, in the above-mentioned patent documentation 1 described structure, the sheet metal that is installed in the through hole the inside is connected with wiring pattern, thus, the electrode of the side in its inner light-emitting diode that carries is connected with this sheet metal, the electrode of opposite side for example by lead-in wire bonding etc., is connected with other connecting wiring pattern on being formed on a circuit board part.But, be formed on other the structure of connecting wiring pattern on this circuit board part, be not suitable for the situation of carrying a plurality of light-emitting diodes on the sheet metal that is installed in the through hole the inside.
In addition, in the above-mentioned patent documentation 1 described structure, by lead-in wire bonding etc. the opposite side electrode of the inner light-emitting diode that carries is connected with connecting wiring pattern on being formed on a circuit board part, then, fill the inner through hole that has carried light-emitting diode with transparent resin, form optical element.But, the lead-in wire bonding that the electrode of light-emitting diode is connected with wiring pattern, outstanding from above-mentioned circuit board top, therefore, in through hole, fill the operation of transparent resin after hindering, can't fill transparent resin exactly.And, also on circuit board and set up the emission boxboard, surround the through hole that light-emitting diode has been carried in inside in the above-mentioned patent documentation 1.But, in the said structure, after being provided with a plurality of light-emitting components on the circuit board, be difficult to correctly install this reflection boxboard, and a part of light that light-emitting diode is launched leaks from the bonding part of above-mentioned circuit board with the reflection boxboard, and therefore, the conversion efficiency of light reduces.When having carried a plurality of light-emitting diode in the particularly above-mentioned through hole, this phenomenon is even more serious.
In addition, in above-mentioned patent documentation 2 and the 3 described structures, be formed on through hole the inside on the insulating properties substrate sheet metal as heating panel has been installed, its surface is provided with light-emitting diode, but it is different with above-mentioned patent documentation 1, the electrical connection of the electrode of light-emitting diode, and be formed between the wiring pattern on aforesaid substrate surface and carry out.But this structure is not suitable for carries a plurality of light-emitting diode structure on the sheet metal that is installed in the through hole the inside.That is, patent documentation 2 and 3 described structures also have above-mentioned same problem points.
Therefore, the present invention invents in view of the problem points in the above-mentioned conventional art, specifically, its purpose is, the circuit board of a kind of chip component type light emitting device and use thereof is provided, and is the chip component type light emitting device that a plurality of light-emitting components have been carried in inside, can improve light conversion efficiency, and be applicable to volume production, therefore can make at low cost.
In order to achieve the above object, according to the present invention, provide a kind of chip component type light emitting device or circuit board, this circuit board has the substrate and the stacked reflection substrate that is bonded in above the above-mentioned substrate of the light-emitting component that lift-launch holds;
Be formed with on the part of above-mentioned substrate the non-through hole of light-emitting component lift-launch in inside, and be formed with the wiring pattern that is used for above-mentioned light-emitting component electrical connection on the upper end peripheral part of this substrate, and be formed with the heat dissipation conductor of thickness on the bottom surface of above-mentioned non-through hole than the metal foil thickness that forms above-mentioned wiring pattern;
Above-mentioned reflection substrate does not block the non-through hole that is formed on the above-mentioned substrate, but be formed with the through hole of diameter greater than above-mentioned non-through hole, be formed with the reflectance coating that constitutes by metallic film on the perimeter surface in it, and be formed with when this reflection substrate is arranged on the above-mentioned substrate part light-emitting component bonding pad of the wiring pattern that exposes from the bottom surface of the through hole of this reflection substrate at the upper end peripheral part of the non-through hole of above-mentioned substrate
Also be formed with a plurality of through holes that connect above-mentioned two substrates on the end face of above-mentioned substrate and stacked bonding above-mentioned reflection substrate in the above; After the element mounted; Approximate centre position along the through hole of above-mentioned two substrates cuts off; And the part of the above-mentioned wiring pattern on the peripheral part that forms in interior week of this through hole respectively with the through hole that is formed on above-mentioned substrate is the conductor layer that the light-emitting component bonding pad is electrically connected; Have and make above-mentioned light-emitting component and the outside terminal electrode that is connected
Bottom at the non-through hole of substrate is equipped with a plurality of light-emitting components, and at this above substrate, on the inside of the through hole of reflection substrate promptly is not reflected the part that substrate covers, be formed for and these a plurality of light-emitting components between by the described wiring pattern that connects up of lead-in wire bonding, make it surround the non-through hole of above-mentioned substrate.
In order to achieve the above object,, provide a kind of circuit board, be used for holding element mounted, it is characterized in that in insulated substrate inside according to the present invention:
Substrate and the stacked reflection substrate that is bonded in above the above-mentioned substrate with light-emitting component that lift-launch holds;
Be formed with on the part of above-mentioned substrate the non-through hole of light-emitting component lift-launch in inside, and be formed with the wiring pattern that is used for above-mentioned light-emitting component electrical connection on the upper end peripheral part of this substrate, and be formed with the heat dissipation conductor of thickness on the bottom surface of above-mentioned non-through hole than the metal foil thickness that forms above-mentioned wiring pattern;
Above-mentioned reflection substrate does not block the non-through hole that is formed on the above-mentioned substrate, but be formed with the through hole of diameter greater than above-mentioned non-through hole, be formed with the reflectance coating that constitutes by metallic film on the perimeter surface in it, and on the upper end peripheral part of the non-through hole of above-mentioned substrate, be formed with when this reflection substrate is arranged on the above-mentioned substrate part light-emitting component bonding pad of the wiring pattern that exposes from the bottom surface of the through hole of this reflection substrate
Also be formed with a plurality of through holes that connect above-mentioned two substrates on the end face of above-mentioned substrate and stacked bonding above-mentioned reflection substrate in the above; After the element mounted; Approximate centre position along the through hole of above-mentioned two substrates cuts off; And the part of the above-mentioned wiring pattern on the peripheral part that forms in interior week of this through hole respectively with the through hole that is formed on above-mentioned substrate is the conductor layer that the light-emitting component bonding pad is electrically connected; Have and make above-mentioned light-emitting component and the outside terminal electrode that is connected
Bottom at the non-through hole of substrate is equipped with a plurality of light-emitting components, and at this above substrate, on the inside of the through hole of reflection substrate promptly is not reflected the part that substrate covers, be formed for and these a plurality of light-emitting components between by the described wiring pattern that connects up of lead-in wire bonding, make it surround the non-through hole of above-mentioned substrate.
According to the present invention, in said chip component type light emitting device or the circuit board, the reflectance coating that is made of metallic film on the interior perimeter surface of the through hole of above-mentioned reflection substrate or the interior perimeter surface of above-mentioned substrate non-through hole is preferably by any metallic film in the good silver of white light reflection efficiency, nickel, the aluminium is formed.
According to the present invention, in preferred said chip component type light emitting device or the circuit board, also be formed with a plurality of through holes that connect above-mentioned two substrates on the end face of above-mentioned substrate and stacked bonding above-mentioned reflection substrate in the above, after the element mounted, approximate centre position along the through hole of above-mentioned two substrates cuts off, and the conductor layer that the part (light-emitting component bonding pad) of the above-mentioned wiring pattern on the peripheral part that forms in interior week of this through hole respectively with the through hole that is formed on above-mentioned substrate is electrically connected has the terminal electrode that above-mentioned light-emitting component and outside are connected.
According to the present invention, in the terminal electrode of preferred above-mentioned circuit board, the any place that connects in the lower surface of the upper surface of above-mentioned reflection substrate of through hole of above-mentioned substrate and stacked bonding these two substrates of above-mentioned reflection substrate in the above or above-mentioned substrate is formed with the non-through hole that seals with plugging part, after the element mounted, approximate centre position along the non-through hole of above-mentioned two substrates cuts off, as terminal electrode.
According to the present invention, the reflecting surface that is preferably formed in week in the through hole on the stacked reflection substrate that is bonded in above the above-mentioned substrate is the upper surface taper bigger than this substrate bottom surface, and its tapering is 90 °～120 °.
As above-mentioned,, can provide the chip component type light emitting device of the higher light output of conversion efficiency and the circuit board of use thereof according to the present invention.
Embodiment
Describe embodiments of the present invention with reference to the accompanying drawings in detail.
At first, Fig. 1 represents the chip component type light emitting device of one embodiment of the present invention and the circuit board of use thereof.The circuit board of this chip component type light emitting device and use thereof, as shown in the figure, profile is roughly foursquare tabular, is that 8 light- emitting diodes 30,30... constitute by substrate 10, stacked being bonded in the reflection substrate 20 on this substrate, a plurality of light-emitting components such as this example basically.As 8 light-emitting diodes 30, the 30... of a plurality of light-emitting components, be arranged on the through hole 11 that forms on above-mentioned substrate 10 substantial middle on (end) face, positional alignment setting in accordance with regulations on thick metallic film 12 surfaces that form heating panel.And, being formed on the surface of the inner peripheral surface of the through hole 11 on this substrate 10 and above-mentioned metallic film 12, the reflectance coating 13 that constitutes as metallic films such as silver forms as one, and the back will describe in detail.
In addition, 2 expressions of accompanying drawing constitute the substrate 10 of the circuit board of said chip component type light emitting device and use thereof, as shown in the figure, above the above-mentioned substrate 10, for above-mentioned a plurality of light- emitting diode 30,30... are electrically connected with not shown external drive circuit, wiring pattern 14,14... equally spaced are arranged on above-mentioned through hole 11 peripheries, surround above-mentioned through hole 11, its manufacturing process will describe in detail in the back.Among Fig. 1, symbol 15,15... represent to make lead-in wire that be electrically connected, as connecting up by the lead-in wire bonding between a plurality of light-emitting diodes 30,30... and above-mentioned wiring pattern 14,14....
In addition, also form through hole 21 on the stacked substantial middle part that is bonded in the reflection substrate 20 above the above-mentioned substrate 10, also formed the reflectance coating 22 that constitutes as metallic films such as silver on the inner peripheral surface of this through hole 21, its manufacturing process will describe in detail in the back.The diameter of this through hole 21 is bigger than the diameter that is formed on the through hole 11 on the above-mentioned substrate 10, therefore, as above-mentioned shown in Figure 1, under these reflection substrate 20 stacked states that are bonded on the above-mentioned substrate 10, be formed on the wiring pattern 14 on the above-mentioned substrate, the part of 14..., a part that more specifically is formed in the wiring pattern on through hole 11 peripheral parts of substrate 10 is exposed by this through hole 21.That is, stackedly on substrate 10 bonding on the substrate of reflection substrate 20 a plurality of light-emitting diodes 30,30... are set, then as above-mentioned, by the lead-in wire bonding etc., be formed on above-mentioned substrate 10 above wiring pattern 14,14... between be electrically connected.So with the lead-in wire 15, the 15... that are electrically connected between above-mentioned wiring pattern 14,14..., in above-mentioned stacked 2 bonding substrates (substrate 10 and reflection substrate 20) inside, that is, lead-in wire 15 is not outstanding above reflection substrate 20, can connect yet.
As above-mentioned shown in Figure 1, be formed with end electrode 40, the 40... of a plurality of (being 8 * 2=16 in this example) on the substrate 10 of the circuit board of formation chip component type light emitting device and use thereof and each end face of reflection substrate 20.That is, when carrying this chip component type light emitting device on as other substrates such as motherboards by these end electrodes 40,40..., can realize be formed on substrate on wiring pattern between be electrically connected.
Illustrated above 3～Fig. 5 illustrates with reference to the accompanying drawings in the circuit board of the chip component type light emitting device of detailed structure and use thereof, with stacked be bonded on the reflection substrate 20 of substrate 10 and the manufacture method of the substrate that constitutes.
The manufacture method of the above-mentioned substrate 10 of accompanying drawing 3 expression has been represented the cross-section structure in each stage in the manufacture process of substrate 10 among this figure.
At first, prepare center base material 300 as the about 0.3mm of thickness of insulating material such as epoxy resin formation, one face (in the legend top) has gone up the Copper Foil 310 of the about 18 μ m of thickness bonding, another side (in the legend following) is bonding adhesive sheet 320[Fig. 3 (a) of the about 25 μ m of thickness].Then, on base material 300 surfaces of above-mentioned preparation, on the position of above-mentioned through hole 11 (with reference to above-mentioned Fig. 1) as utilize NC to offer as in this example
Figure S05834260X20070410D000051
3.1 about hole [Fig. 3 (b)].Then, below above-mentioned base material 300, Copper Foil 330[Fig. 3 (c) of bonding, thickness about 70 μ ms 310 thicker on the promptly opposite face than above-mentioned Copper Foil with the face of bonding Copper Foil 310].Then, on the position that forms end electrode 40,40... (with reference to above-mentioned Fig. 1), offer as
Figure S05834260X20070410D000052
0.6 about hole [Fig. 3 (d)], and implement copper coating 340[Fig. 3 (e) of the about 20 μ m of thickness on the whole].
Then, on above-mentioned base material 300, promptly, for example utilize etching, remove above-mentioned Copper Foil 310, form specified circuit pattern 14[Fig. 3 (f) thus] with the engaging on (bonding) face of above-mentioned reflection substrate 20.Then from the bonding prior adhesive sheet 350[Fig. 3 (g) that has formed peristome at assigned position in the specified circuit pattern top that forms], obtain above-mentioned substrate 10 thus.By an example of the above-mentioned substrate that obtains 10, as above-mentioned shown in Figure 2.
The manufacture method of the above-mentioned reflection substrate 20 of accompanying drawing 4 expression among this figure, is represented the cross-section structure in each stage in the manufacture process of above-mentioned reflection substrate 20.
At first, prepare as the center base material 400 of the about 0.3mm of thickness of insulating material such as epoxy resin formation its two sides the is bonding adhesive sheet 410 of the about 25 μ m of thickness, 420[Fig. 4 (a)].Then, on the lip-deep above-mentioned through hole 21 of above-mentioned base material 400 position of (with reference to above-mentioned Fig. 1) as utilize NC to offer
Figure S05834260X20070410D000061
5.0 about the hole, and on the position that forms above-mentioned end electrode 40,40..., offer as
Figure S05834260X20070410D000062
0.6 about hole [Fig. 4 (b)].Then, above-mentioned base material 400 tables (on) face is bonding has offered on above-mentioned through hole 21 positions in advance
Figure S05834260X20070410D000063
5.0 about the Copper Foil 430 in hole, and on the position of above-mentioned through hole 21 and above-mentioned end electrode 40, offered in advance in that its back of the body (descending) face is bonding
Figure S05834260X20070410D000064
5.0 about the Copper Foil 440[Fig. 4 (c) in hole], copper coating 450[Fig. 4 (d) of the about 20 μ m of whole implementation thickness then], and utilize etching to remove to be formed on above-mentioned base material 300 tables (on) Copper Foil 430 of face, form predetermined pattern [Fig. 4 (e)], obtain above-mentioned reflection substrate 20.
Then, with reference to Fig. 5 the reflection substrate 20 stacked operations that are bonded on the substrate 10 that will obtain above are described.Here, stacked bonding reflection substrate of making 20 and substrate 10 are represented by the cross-section structure in each stage in its manufacture process.
At first, will be layered in [Fig. 5 (a)] on the substrate 10 that obtains by above-mentioned Fig. 3 (g) by the reflection substrate 20 that above-mentioned Fig. 4 (e) obtains.That is stacked bonding reflection substrate 20 on the adhesive sheet 350 on be bonded in above-mentioned substrate 10.Then, utilize etching etc. to remove the above-mentioned stacked Copper Foil 330 that is bonded in the about 70 μ m of thickness below the substrate 10, form the solder side circuit [Fig. 5 (b)] of chip component type light emitting device.Implement nickel (Ni) layer of the about 5 μ m of thickness and gold (Au) layer precious metal plating 510[Fig. 5 (c) that constitutes of the about 0.3 μ m of thickness then on the whole].Then bonding masking tape 520[Fig. 5 (d) below substrate 10 whole], at thick silver (Ag) layer 530[Fig. 5 (e) of the about 0.3 μ m of its whole implementation].Peel off then and be attached to above-mentioned substrate 10 whole following masking tapes [Fig. 5 (f)], make the substrate 10 stacked substrates that are bonded on the reflection substrate 20.Then, in the through hole 11 of above-mentioned substrate 10, a plurality of light-emitting diodes are arranged on the heating panel 12 of (end) face in it, connect up, obtain chip component type light emitting device.Owing to make a plurality of devices simultaneously in the above-mentioned operation,, a plurality of substrates made one so use the big substrate of surface area.And, after the chain-dotted line among above-mentioned Fig. 5 (f) is illustrated in and a plurality of light-emitting diodes are installed in the aforesaid substrate are finished chip component type light emitting device, be used for the cut-out line of each chip part of separation cut.
Circuit board according to the chip component type light emitting device that obtains by above-mentioned manufacturing process, as shown in Figure 6, on heating panel (metallic film) 12 set on (end) face in the through hole 11 that forms on the substantial middle part of the substrate 10 that constitutes aforesaid substrate, by the high moulding resin material 60 of conductivity of heat, above-mentioned a plurality of light-emitting diodes 30,30... are fixed on the assigned position.Connect up by lead-in wire bonding etc. then.At this moment, as above-mentioned shown in Figure 1, and the wiring pattern 14, the 14... that implement wiring between the light-emitting diode form as be laminated into 2 layers substrate the downside substrate above-mentioned substrate 10 table (on) face, and the part of these wiring patterns 14,14... is exposed from the through hole 21 that bonding reflection substrate 20 surfaces are in the above offered, each electrode of a plurality of light-emitting diodes 30,30... connects up between bonding and wiring pattern 14,14... by going between.Among this Fig. 6, the lead-in wire that is connected up is by symbol 15 expressions.
Thus, pass through said structure, the lead-in wire 15 that connects up between the electrode of above-mentioned a plurality of light-emitting diodes 30,30... and wiring pattern 14, the 14... not from the table of said chip component type light emitting device substrate (on) face, be reflection substrate 20 table (on) face is outstanding, can be installed in substrate inside.That is, according to the said structure of chip component type light emitting device, light- emitting diode 30,30... need not fill transparent resin in order to protect its wiring portion after carrying on substrate at an upper portion thereof.
In other words, as above-mentioned shown in Figure 6, be installed at light- emitting diode 30,30... under the state of substrate inside, as chip component type light emitting device, the light source that can be used as backlight as display floater, liquid crystal indicator, lighting device etc. uses.And, as above-mentioned, because can carry a plurality of light- emitting diodes 30,30..., so can access high light output, and need on light-emitting diode 30, not fill transparent resin, so can access light that element sends not by this transparent resin absorbs, conversion efficiency is higher chip component type light emitting device.And, by not needing to fill transparent resin above the above-mentioned light-emitting diode 30, so the heating of element internal can not influence diffusion towards periphery because of this resin of filling in the above, can not rise in other words because of being stuck in the inner luminous diode temperature that causes of this resin.
In addition, as above-mentioned shown in Figure 6, on the substrate 10 that constitutes above-mentioned circuit board, formed reflection substrate 20, and, on the inner peripheral surface of the bottom surface of the through hole of offering on the substrate 10 11 and inner circumferential surface and the through hole 21 offered on the reflection substrate 20, as above-mentioned, its just individual face has all been implemented the precious metal plating 510 by nickel (Ni) layer and gold (Au) layer formation, and has also formed the reflectance coating 13,22 that is made of silver-colored (Ag) layer 530 (about 1 μ m of thickness) on its surface.Therefore, be arranged on the light that a plurality of light-emitting diodes 30,30... of through hole 11 inside of substrate 10 penetrate, by these reflectance coatings 13,22 reflections, can be leaked to the outside, draw on the top of the through hole of offering from reflection substrate 20 21.That is, can obtain the high light output of a plurality of light-emitting components with good conversion efficiency.
The variation of the circuit board of accompanying drawing 7 expression said chip component type light emitting devices and use thereof.As shown in the figure, according to this variation, in the structure of said chip component type light-emitting component, the table of its reflection substrate 20 (on) face installs as transparent plate-shaped members 70 such as glass and resins, and, form as being used for the so-called optical elements such as lens of diffused light with the part of this plate-shaped member 70.Promptly, according to said structure, the same with the foregoing description, the thermal diffusivity of light-emitting component is good, and can obtain the high light output of a plurality of light-emitting components with good conversion efficiency, and its output only diffusion back is penetrated, and therefore is particularly useful for the chip component type light emitting device that the light sources such as backlight, lighting device as display floater, liquid crystal indicator use.And,,, can prevent to invade through hole 11,21 inner causing, the therefore destructions that can prevent light-emitting component 30 as 15 short circuits or the breakage of going between because of the foreign matter of device outside by plate-shaped member 70 according to said structure.
Other variation of the circuit board of accompanying drawing 8 expression said chip component type light emitting devices and use thereof.As shown, according to this variation, through hole 11, the 21 inner transparent resins of on above-mentioned substrate 10 and reflection substrate 20, offering of filling, make lead-in wire 15 dippings and the curing of its inner a plurality of light-emitting diodes 30,30... and wiring usefulness thereof of carrying, and its outer peripheral face is for example formed convex, thus, the so-called optical element is formed as one.And according to said structure, can obtain the high light output of a plurality of light-emitting components with good conversion efficiency, and its only diffusion back output of output is particularly useful for the chip component type light emitting device that the light sources such as backlight, lighting device as display floater, liquid crystal indicator use.And, invade for the foreign matter of device outside, can safeguard protection lead-in wire and light-emitting diode 30.
In above-mentioned Fig. 7 or the variation shown in Figure 8, the through hole of on above-mentioned substrate 10, offering 11 for example, the 21 inner a plurality of light-emitting diodes 30 that are provided with, 30... when being blue LED, be installed in reflection substrate 20 table (on) the transparent plate-shaped member 70 or the through hole 11 of face, sneak in the 21 inner transparent resins 80 of filling blue light is converted to the parts of white light after, can obtain to obtain the chip component type light emitting device of white light easily, and the chip component type light emitting device of white light is suitable as display floater most, the backlight of liquid crystal indicator, the light source of lighting device etc.Above-mentioned parts for example have the material of sneaking into fine silicon dioxide, YAG fluorophor and forming in epoxy resin.
In addition, in the circuit board of said chip component type light emitting device and use thereof, the structure of the end electrode 40,40 that forms on each end face of substrate according to above-mentioned substrate 10 and reflection substrate 20 stacked back formations, because its upper surface is by semicircular conductor layer 41 sealings, so when filling above-mentioned transparent resin 80, even leak into the outside from through hole 11,21, can not arrive its electrode surface yet, can obtain end electrode 40,40 reliably.
Through hole 11 inside of offering on the above-mentioned substrate 10 of accompanying drawing 9 expressions, on heating panel (metallic film) 12 surfaces that (end) face is provided with in it, other examples of the arrangement of a plurality of light-emitting diodes.That is in the foregoing description,, be that 8 light-emitting diodes 30,30... are set to 4 row, 2 row respectively, as an example.But the present invention is not limited to above-mentioned example, and is as shown in the drawing, also can be along the inner peripheral surface setting of above-mentioned through hole 11.Perhaps these 8 light-emitting diodes during for example as 1 piece 30 ' supply, as shown in Figure 10, in above-mentioned through hole 11 inside, are arranged on the substantial middle part on its heating panel (metallic film) 12 surfaces.And can arrange with additive method.
Fig. 2 represents in the circuit board of said chip component type light emitting device and use thereof, is formed on its a plurality of wiring patterns 13 above substrate 10, the example of 13....As shown in the figure, among this embodiment, adjacent wiring pattern 14,14 is electrically connected.Particularly, be tactic by "+" "+" "-" "-" with "+" of adjacent a pair of light-emitting diode, wiring pattern that "-" electrode is connected.And arrangement according to above-mentioned wiring pattern 13,13..., be arranged on a plurality of light-emitting diodes 30 in the substrate, 30... by after being electrically connected between lead-in wire bonding etc. and wiring pattern 14,14..., even near each other or contact between the lead-in wire 15,15 after the wiring, also owing to being identical polar, so can avoid the generation of short circuit.
Among the above-mentioned various embodiment, the through hole of on above-mentioned substrate 10 and reflection substrate 20, offering the 11, the 21st, circular, but the present invention is not limited thereto, and also can be oval or square.At this moment also can access above-mentioned same effect.In addition, in the foregoing description, through hole 11,21 and the inner circumferential surface offered on above-mentioned substrate 10 and reflection substrate 20 are vertically formed, on this point, the present invention also is not limited thereto, for example on base material, form through hole 11,21 o'clock [with reference to above-mentioned Fig. 3 (b) or Fig. 4 (b)],, can make the inner circumferential surface inclination by using as taper drill etc.
In the above-mentioned explanation, in the chip component type light emitting device of said structure and the circuit board of use thereof, be arranged on a plurality of light-emitting components of through hole 11 inside of its substrate 10,, illustrate with 8 light-emitting diodes 30,30... as an example.But the present invention is not limited thereto, can be the number (for example preferably 4,6,9,10 etc.) more than 2 or 2, in addition, light-emitting component be not limited to above-mentioned light-emitting diode, can be other semiconductor light-emitting elements also, those skilled in the art should be understood that.In addition, being arranged on a plurality of light-emitting components of through hole 11 inside of above-mentioned substrate 10 can be by constituting as the trichromatic redness of light, green, blue light-emitting diode.At this moment, be arranged on by the light-emitting diode that makes up above-mentioned three looks in the through hole 11 of above-mentioned substrate 10, can access white light, perhaps make up more than 2 kinds or 2 kinds, also can access the light of expectation tone.
Description of drawings
The expansion stereogram of the chip component type light emitting device of [Fig. 1] expression one embodiment of the present invention and the Wiring base plate structure of use thereof.
The expansion stereogram of the substrate structure of the circuit board of [Fig. 2] expression formation said chip component type light emitting device and use thereof.
[Fig. 3 (a)～(g)] is used to represent the process chart of the manufacture method of above-mentioned substrate, represents the cross-section structure in each stage in its manufacture process.
[Fig. 4 (a)～(e)] is used to represent the process chart of the manufacture method of above-mentioned reflection substrate, represents the cross-section structure in each stage in its manufacture process.
[Fig. 5 (a)～(f)] represents the stacked process chart that is bonded in the manufacture method of the substrate above the above-mentioned substrate of above-mentioned reflection substrate, represents the cross-section structure in each stage in its manufacture process.
Carry the profile that a plurality of optical elements constitute the structure of chip component type light emitting device on the substrate that [Fig. 6] expression said method obtains.
The profile of the structure of the circuit board variation of [Fig. 7] expression said chip component type light emitting device and use thereof.
The profile of the structure of other variation of circuit board of [Fig. 8] expression said chip component type light emitting device and use thereof.
The profile of other examples that light-emitting component is arranged in [Fig. 9] expression said chip component type light emitting device.
The profile of other examples that light-emitting component is arranged in [Figure 10] expression said chip component type light emitting device.
Symbol description
10 substrates
11 through holes
12 heating panels (thick metallic film)
13 reflectance coatings
14 wiring patterns
15 wirings are with going between
20 reflection substrates
21 through holes
22 reflectance coatings
30 light-emitting diodes
40 end electrodes

Claims (8)

1. chip component type light emitting device holds in insulated substrate inside and to have carried light-emitting component, it is characterized in that:
This insulated substrate has the substrate and the stacked reflection substrate that is bonded in above the above-mentioned substrate of the light-emitting component that lift-launch holds;
Be formed with on the part of above-mentioned substrate the non-through hole of light-emitting component lift-launch in inside, and be formed with the wiring pattern that is used for above-mentioned light-emitting component electrical connection on the upper end peripheral part of this substrate, and be formed with the heat dissipation conductor of thickness on the bottom surface of above-mentioned non-through hole than the metal foil thickness that forms above-mentioned wiring pattern;
Above-mentioned reflection substrate does not block the non-through hole that is formed on the above-mentioned substrate, but be formed with the through hole of diameter greater than above-mentioned non-through hole, be formed with the reflectance coating that constitutes by metallic film on the perimeter surface in it, and be formed with when this reflection substrate is arranged on the above-mentioned substrate part light-emitting component bonding pad of the wiring pattern that exposes from the bottom surface of the through hole of this reflection substrate at the upper end peripheral part of the non-through hole of above-mentioned substrate
Also be formed with a plurality of through holes that connect above-mentioned two substrates on the end face of above-mentioned substrate and stacked bonding above-mentioned reflection substrate in the above; After the element mounted; Approximate centre position along the through hole of above-mentioned two substrates cuts off; And the part of the above-mentioned wiring pattern on the peripheral part that forms in interior week of this through hole respectively with the through hole that is formed on above-mentioned substrate is the conductor layer that the light-emitting component bonding pad is electrically connected; Have and make above-mentioned light-emitting component and the outside terminal electrode that is connected
Bottom at the non-through hole of substrate is equipped with a plurality of light-emitting components, and at this above substrate, on the inside of the through hole of reflection substrate promptly is not reflected the part that substrate covers, be formed for and these a plurality of light-emitting components between by the described wiring pattern that connects up of lead-in wire bonding, make it surround the non-through hole of above-mentioned substrate.
2. chip component type light emitting device according to claim 1, it is characterized in that: the reflectance coating that constitutes by metallic film on the interior perimeter surface of the through hole of above-mentioned reflection substrate or the interior perimeter surface of above-mentioned substrate non-through hole, by any metallic film in the good silver of white light reflection efficiency, nickel, the aluminium is formed.
3. chip component type light emitting device according to claim 1, it is characterized in that: in the above-mentioned terminal electrode, the any place that connects in the lower surface of the upper surface of above-mentioned reflection substrate of through hole of above-mentioned substrate and stacked bonding these two substrates of above-mentioned reflection substrate in the above or above-mentioned substrate is formed with the non-through hole that seals with plugging part, after the element mounted, approximate centre position along the non-through hole of above-mentioned two substrates cuts off, as terminal electrode.
4. chip component type light emitting device according to claim 1, it is characterized in that: the reflecting surface that is formed on week in the through hole on the stacked reflection substrate that is bonded in above the above-mentioned substrate is the upper surface taper bigger than this through hole bottom surface, and its tapering is 90 °～120 °.
5. a circuit board is used for holding element mounted in insulated substrate inside, it is characterized in that:
Substrate and the stacked reflection substrate that is bonded in above the above-mentioned substrate with light-emitting component that lift-launch holds;
Be formed with on the part of above-mentioned substrate the non-through hole of light-emitting component lift-launch in inside, and be formed with the wiring pattern that is used for above-mentioned light-emitting component electrical connection on the upper end peripheral part of this substrate, and be formed with the heat dissipation conductor of thickness on the bottom surface of above-mentioned non-through hole than the metal foil thickness that forms above-mentioned wiring pattern;
Above-mentioned reflection substrate does not block the non-through hole that is formed on the above-mentioned substrate, but be formed with the through hole of diameter greater than above-mentioned non-through hole, be formed with the reflectance coating that constitutes by metallic film on the perimeter surface in it, and on the upper end peripheral part of the non-through hole of above-mentioned substrate, be formed with when this reflection substrate is arranged on the above-mentioned substrate part light-emitting component bonding pad of the wiring pattern that exposes from the bottom surface of the through hole of this reflection substrate
Also be formed with a plurality of through holes that connect above-mentioned two substrates on the end face of above-mentioned substrate and stacked bonding above-mentioned reflection substrate in the above; After the element mounted; Approximate centre position along the through hole of above-mentioned two substrates cuts off; And the part of the above-mentioned wiring pattern on the peripheral part that forms in interior week of this through hole respectively with the through hole that is formed on above-mentioned substrate is the conductor layer that the light-emitting component bonding pad is electrically connected; Have and make above-mentioned light-emitting component and the outside terminal electrode that is connected
Bottom at the non-through hole of substrate is equipped with a plurality of light-emitting components, and at this above substrate, on the inside of the through hole of reflection substrate promptly is not reflected the part that substrate covers, be formed for and these a plurality of light-emitting components between by the described wiring pattern that connects up of lead-in wire bonding, make it surround the non-through hole of above-mentioned substrate.
6. circuit board according to claim 5, it is characterized in that: the reflectance coating that constitutes by metallic film on the interior perimeter surface of the interior perimeter surface of the through hole of above-mentioned reflection substrate or the non-through hole of above-mentioned substrate, by any metallic film in the good silver of white light reflection efficiency, nickel, the aluminium is formed.
7. circuit board according to claim 5, it is characterized in that: in the above-mentioned terminal electrode, the any place that connects in the lower surface of the upper surface of above-mentioned reflection substrate of through hole of above-mentioned substrate and stacked bonding these two substrates of above-mentioned reflection substrate in the above or above-mentioned substrate is formed with the non-through hole that seals with plugging part, after the element mounted, approximate centre position along the non-through hole of above-mentioned two substrates cuts off, as terminal electrode.
8. circuit board according to claim 5 is characterized in that: the reflecting surface that is formed on the interior week of the through hole on the stacked reflection substrate that is bonded in above the above-mentioned substrate is the upper surface taper bigger than this through hole bottom surface, and its tapering is 90 °～120 °.
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US20090014732A1 (en) 2009-01-15
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TW200610201A (en) 2006-03-16
WO2006028073A1 (en) 2006-03-16

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